<template>
    <el-aside :width="isCollapse ? '64px' : '200px'">
        <div :class="isCollapse ? 'collapse-btn closed tc' : 'collapse-btn opened tr'" style="line-height:36px;border-bottom:1px solid #ddd;">
            <a @click="isCollapse = false" v-if="isCollapse">
                <el-tooltip class="item" effect="dark" content="展开" placement="right">
                    <i class="el-icon-d-arrow-right"></i>
                </el-tooltip>
            </a>
            <a @click="isCollapse = true" v-if="!isCollapse">
                <i class="el-icon-d-arrow-left"></i>收起
            </a>
        </div>
        <el-menu default-active="1-4-1" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose" :collapse="isCollapse">
            <el-submenu index="1">
                <template slot="title">
                    <i class="el-icon-location"></i>
                    <span slot="title">导航一</span>
                </template>
                <el-menu-item-group>
                    <span slot="title">分组一</span>
                    <el-menu-item index="1-1">选项1</el-menu-item>
                    <el-menu-item index="1-2">选项2</el-menu-item>
                </el-menu-item-group>
                <el-menu-item-group title="分组2">
                    <el-menu-item index="1-3">选项3</el-menu-item>
                </el-menu-item-group>
                <el-submenu index="1-4">
                    <span slot="title">选项4</span>
                    <el-menu-item index="1-4-1">选项1</el-menu-item>
                </el-submenu>
            </el-submenu>
            <el-menu-item index="2">
                <i class="el-icon-menu"></i>
                <span slot="title">导航二</span>
            </el-menu-item>
            <el-menu-item index="3" disabled>
                <i class="el-icon-document"></i>
                <span slot="title">导航三</span>
            </el-menu-item>
            <el-menu-item index="4">
                <i class="el-icon-setting"></i>
                <span slot="title">导航四</span>
            </el-menu-item>
        </el-menu>
    </el-aside>
</template>

<script>
import Vue from 'vue'
import {
    Aside,
    Menu,
    Submenu,
    MenuItem,
    MenuItemGroup,
    Tooltip }
    from 'element-ui'

Vue.use(Aside)
Vue.use(Menu)
Vue.use(Submenu)
Vue.use(MenuItem)
Vue.use(MenuItemGroup)
Vue.use(Tooltip)
export default {
    name: 'index',
    data () {
        return {
            isCollapse: true
        }
    },
    methods: {
        handleOpen (key, keyPath) {
            console.log(key, keyPath)
        },
        handleClose (key, keyPath) {
            console.log(key, keyPath)
        }
    }
}
</script>

<style lang="scss" scoped>
    .el-aside {
        color: #333;
        line-height: 200px;
        transition: all .5s ease;
        overflow-x:hidden;
        border-right: 1px solid #e6e6e6;

        .collapse-btn{
            font-size:12px;
            cursor: pointer;

            &.opened{
                padding-right:20px;
            }

            .el-icon-d-arrow-right{
                display:inline-block;
                padding:0 15px;
            }
        }
    }
    .el-menu-vertical-demo:not(.el-menu--collapse) {
        width: 200px;
        min-height: 400px;
    }
</style>
